i have 3:55. I was told by a friend to get 4:11. what should i get. for speed and power.

 

What size tires are you running now? It looks like 35 or 36's, if so get atleast 4.56's. But if you plan on getting bigger tires or want more low end power them go with 4.88's.

 

I agree, it looks like you have a Fabtech with 35's so 4.56's would be perfect for you.

 

its 37s with a 6 inch fabtech. and 3 inch body

 

Mathematically speking you would need 4.16s to get it back to how it was with stock tires and 3.55s. That being said; 4.10s would be a little less than stock, 4.56s would be a little more than stock. I'd go 4.56s so you have the extra power for the heavier tires.

 

Don't get 4.88s IMO, too much... I love my 4.56s for daily driving, pulling trailers, and offroading. Plenty of gear for my 38s with a 10" lift. And I still get decent MPG. Genuine gears come with a lifetime warranty.

 

Yep 4.56 would be best. I've been running them for about 2 years now and still love them.